Green has revealed few details about the cameo, but confirmed he will appear in the film in an interview with The Indianapolis Star. Green said the idea came from director Josh Boone and producer Wyck Godfrey.
The Fault in Our Stars is set to begin filming next week in Pittsburgh. The movie adaptation stars Shailene Woodley and Ansel Elgort as teenage cancer patients who fall in love, and embark on a heartbreaking journey to Amsterdam to meet an author. Fans have described the book as equally sad as it is funny.
The Fault in Our Stars also stars Laura Dern, Sam Trammell, and Nat Wolff. The movie is scheduled for release some time in late 2014.